Status of the AArch* builders

[Sergio Durigan Junior]

On Monday, October 15 2018, Alan Hayward wrote:

>> On 12 Oct 2018, at 20:06, Sergio Durigan Junior <sergiodj@redhat.com> wrote:
>> 
>> On Thursday, October 11 2018, Alan Hayward wrote:
>> 
>>> I’ve setup buildbot-slave-0.8.14 in a virtualenv/
>>> (Oddly, I had to install twisted==16.4.1, as anything newer than that caused a hang).
>>> 
>>> I’ve manually checked you can build gdb and run the testsuite.
>>> 
>>> My recent experiments with the testsuite on Aarch64 show all the threaded tests
>>> are quite racy on a fully loaded ubuntu, whereas on redhat/suse they are fairly
>>> stable. I’m still looking into why this is. But, in the short-term maybe we should
>>> restrict the number of jobs to 32 (or maybe even fewer?)
>> 
>> Sure, no problem.  What do you think of 16?
>
> I’ve been running some more tests over the weekend. At 32 I still get quite a bit of racy
> behaviour, and at 16 it looks roughly the same as an x86 run.
>
> So yes, 16 sounds good.

Cool, I configured the buildslave to use 16 cores.

>> 
>>> Sergio, could you please add the relevant server config.
>> 
>> It's a good idea to follow the instructions here:
>> 
>>  <https://sourceware.org/gdb/wiki/BuildBot#Buildslave_configuration>
>> 
>> And make sure that all of the necessary/recommended deps are installed
>> in the machine.  The more deps, the more tests will be performed.
>
> All looks good.
>
> I’m not sure who gets access to the wiki (looks like I can’t log in).
> Errors I noticed:
> * There is a mention of both 0.8.14 and 0.8.12 for buildslave

Fixed.

> * The Debian specific instructions should probably also be for Ubuntu too.

Fixed.

Thanks for the heads up.

>> 
>> You will need a password to connect to the BuildBot master.  I will send
>> it to you in private.
>
> Slave created.

Hm, how did you create the slave?  I don't see it connected to the
BuildBot master:

  https://gdb-build.sergiodj.net/buildslaves/ubuntu16-aarch64

>> 
>> I also recommend creating at least 3 builders associated with each
>> slave: native, native-gdbserver, and native-extended-gdbserver.  If
>> you're OK with it, I'll do that.
>> 
>
> That’s fine.

Done.

>> Last question: is there any special flags needed to build GDB on the
>> machine?
>> 
>
> Nope. My usual build line is:
> $ configure --enable-sim --disable-gprof --disable-gold --disable-gas
> $ make

That's great, it should work without modifications then.

Thanks,

-- 
Sergio
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